952 Puerto Barmina June 8 The calls of this species are very similar to those of zonatus — and any differences I note are only general impressions — but there seems a slight but less voriferous and the call seemed less grating or nasal. Degree of difference is no greater than between calls of humilis and rufinucha. Other birds in area: 1) Pipilo — I seen singing in small oak 2) Troglodytes lurmeicelli — abundant in understory and especially around logs on the ground. Young out of nest 3) Piranga flava — several seen. 3) Caprimulgus — collected 2 juveniles — heard a bird calling just at dark from in trees near tent 5) 1 — a whip-poor-will call but distinct from call of C. voriferus of Chiapas highlands, being less clearly whip-poor-will. 3) Red- Worbler — common. Several wrens collected today are in beginning molt of wing and have small gonads. Others are apparently just beginning the breeding season as I took 7 ready to lay eggs.. This is odd when because C.m. nelsoni now has young fully grown - " Matrica " Small boy here called my wrens Matriscula.